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/*
** libproj -- library of cartographic projections
**
** Copyright (c) 2003, 2006 Gerald I. Evenden
*/
static const char
LIBPROJ_ID[] = "Id";
/*
** Permission is hereby granted, free of charge, to any person obtaining
** a copy of this software and associated documentation files (the
** "Software"), to deal in the Software without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#define PROJ_PARMS__ \
int oxford_mode;
#define PROJ_LIB__
# include <lib_proj.h>
PROJ_HEAD(oxford, "Oxford Atlas") "\n\tPCyl., Sph.";
PROJ_HEAD(times, "Times Atlas") "\n\tPCyl., Sph.";
#define C_Y 1.70710678118654752440084436
#define C_X 0.707106781186547524400844362
FORWARD(s_forward); /* spheroid */
double c, t;
xy.y = C_Y * (t = tan(0.5 * lp.phi));
if (P->oxford_mode) {
c = lp.phi * lp.phi;
xy.x = lp.lam * C_X * (1. - 0.04 * c * c);
} else
xy.x = lp.lam * 0.74 * sqrt(1 - 0.5 * t * t);
return (xy);
}
FREEUP; if (P) free(P); }
static PROJ *
setup(PROJ *P, int mode) {
P->es = 0.;
P->fwd = s_forward;
P->inv = 0;
P->oxford_mode = mode;
return P;
}
ENTRY0(oxford) ENDENTRY(setup(P, 1))
ENTRY0(times) ENDENTRY(setup(P, 0))
/*
** Log: proj_oxford.c
** Revision 3.1 2006/01/11 01:38:18 gie
** Initial
**
*/
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